NGif, Animated GIF Encoder for .NET

Introduction

Because .NET Framework can't create animated GIF images, NGif provides a way to create GIF animations in the .NET framework. It can create an animated GIF from several images and extract images from an animated GIF.

The comment "four primes near 500 - assume no image has a length so large" suggests that the images created can't be over 500 pixels. Is it safe to assume that we can replace these primes with larger values for larger images?